Metal coil



Patented Jan. 13, 1942 METAL COIL Agnes J. Reeves Greer, Morgantown, W. Va.

Original application March 10, 1939, Serial No.

261,038, now Patent No. 2,191,463, dated February 27, 1940.

Divided and this application July 8, 1939, SerlaiNo. 283,439.

12 Claims.

The invention relates to coils of metal prepared for pickling in a pickling machine in which the coils are suspended and rotated upon mandrels in the pickling or washing baths, either while the coils are not progressing through the bath, or while progressing through the bath as in the manner disclosed in my prior Patent No. 2,091,921, issued August 31, 1937, Shoemaker Patent No. 2,120,843, issued June 14, 1938, and my co-pending application Serial No. 249,484, now Patent No. 2,196,210, April 9, 1940; and this application is a division of my co-pending application for Method and apparatus for recoiling metal coils, Serial No. 261,038, led March 10, 1939, now Patent No. 2,191,463, Feb. 27, 1940.

In pickling machines of the general type referred to itis necessary that the convolutions of the coil be opened up, or separated, before entering the pickling machine, so that none of the convolutions will remain in contact with each other while in the pickling solution, as otherwise the pickled metal will be marred by black spots or marks where the acid has not had access to the surfaces of the metal.

Prior to the present invention such coils were formed in conventional spiral comprising a continuous curve from the center to the outside of the coil. This frequentlyresulted in two convolutions of the coil contacting with each other for some distance while the coil was in the pickling solution, thus preventing the acid from properly contacting the opposed surfaces of these convolutions of the coil and resulting in an improperly 1 pickled coil having black spots upon the surfaces thus not properly exposed to the action of the acid'. The present invention contemplates the formation of a coil whichfwill prevent any of the convolutions of the coil from remaining in contact with each other during the vtime the coil is passing through the pickling machine.

The object of the invention is to provide a novel metal coil of such shape that none of the convolutions of the coil will remain in contact with each other.

Another object is to provide a metal coil in which each convolution of the coil has a plurality of angular bends therein.

A still further object is the provision of such a' illustrated in ythe accompanying drawings, in which:

Figure 1 is an elevation of a recoiler drum showing the improved metal coil inthe operation of being wound thereon;

Fig. 2, a plan view of the recoiler drum for forming the improved coil, and

Fig. v3, an elevation of a coil formed in accordance with the invention suspended on a mandrel in a pickling machine.

Similar numerals refer to similar parts throughout the several views.

The present invention is directed to the irnproved metal coil per se ani the accompanying drawings and following description discloses one method and apparatus by which the improved coil may be formed.l

The coil of metal to be recoiled for pickling in accordance with the present invention, is uncoiledA and may be fed to the improved recoiler by means of a feeding mechanism including feed rolls, edge rolls,- pinch rolls, brake mechanism, leveling rolls, and the like, as illustrated and described in detail in my co-pending application Serial No. 230,304, illed Sept. 16, 1938, a portion of this mechanism being generally indicated at l0 in Figure 1.

The level rolls are shown in this figure comprising the two lower rolls il which may be Ajournaled in iixed bearings in the housings I0,

and the upper roll l2 which may be journaled in vertically slidable bearings i3 adapted to be E vertically adjusted in the housings toward and from the lower rolls Il as by screws ll having dove-tail heads I5 engaged within dove-tail grooves I6 in the bearings I3.

A spiral gear I1 may be'xed upon the upper end of each screw I4 and meshes with a spiral gear I8 upon a shaft I9 which may be manually operated for adjusting the upper roll relative to the lower rolls.

The recoiling and back spinning drum and associated parts may be of the same construction and arrangement as shown in detail in my ccpending application Serial No. 230,304, above referred to, and isy mounted upon a base 20, a

`portion o! which is indicated in the drawings,

the form of bars 23 which may be welded or otherwise attached to the drum at spaced intervals around its exterior.

These ribs are preferably longitudinally disposed relative to the drum as shown in Fig. 4, although, if desired, they ma;r be somewhat angularly disposed.

It has been found in actual practice that the best results may be obtained by locating the ribs 23 at irregularly spaced points around the exterioriof the drum as best shown in-Figs. l and 2 in order that the angular bends formed thereby in the convolutions of the coil will be located at irregularly spaced points.

'Ihe drum and associated parts may otherwise, be constructed and operated in the manner illustrated in detail in my co-pending application Serial No. 230,304, above referred-to, although only a portion of such structure is illustrated in the present application.

As shown in said co-pending application a semi-cylindric guard plate 24 may be located around the drum at a suitable distance therefrom being carried upon the spokes 25 which radiate from the bearing portion of the standard 2|, and a stop 26 may be provided for engaging and holding the outer end of the coil.

'I'he drum 22 may be provided with an angular slot 21 for receiving the inner end of the coil and any suitable clamping means such as disclosed in detail in application Serial No. 230,304 may be provided upon the drum for clamping this inner end of the coil.

The cradle 28 may be slidably mounted relative to the drum and also arranged to tilt as disclosed in said co-pending application, and a stripper plate 29 may be operatively connected to the cradle for the purpose of removing the coil from the drum to deposit it upon the cradle when the recoiling and back spinning has been accomplished, all in the manner villustrated and described in application Serial No. 230,304.

In the operation of the machine to form a coil ready for passage through the pickling machine, the metal strip S is fed through the feeding mechanism indicated generally at I and the end thereof is inserted into the angular slot 21 in the drum 22.

The drum is then rotated counter-clockwise as viewed in Fig.- l coiling the metal strip upon the drum as shown in said figure to form a coil indicated at C, the strip being held under tension by means of the rolls in the feeding mechanism I0 so that the convolutions of the coil are wrapped tightly upon one another as shown.

The ribs 23 upon the drum cause the formation of angular bends B in all of the convolutions of the coil and with the ribs irregularly spaced around the exterior of the drum as illustrated in the drawings these angular bends are irregularly spaced throughout all of the convolutions of the coil.

The portions of the convolutions between these angular bends are only slightly curved as cornpared with the conventional spiral coil, and as disclosed in thedrawings these portions of the innermost convolutions of the coil are nearly straight.

When the metal has been entirely fed through the feeding mechanism and the tension of the rolls thereof has been released upon the outer end of the coil, the drum may be stopped and dicated at B' so that the outer convolution of the coil when wired to the next adjacent convolution will not closely contact the same.

The outer end of the coil is then engaged with the stop 26 and the drum is rotated in a clockwise direction, as viewed in Fig. 1, the coil being thus back spun and the convolutions thus being separated or opened up to the position as shown in Fig. 3. This back spinning of the coil moves all of the convolutions thereof with relation to 4each other so that the angular bends B of each convolution are spaced relative to the angular bends of adjacent convolutions.

The coil in this condition is then removed fromA jacent convolution by wire or the like as inthis outer end portion of the coil may `be manually bent at a point spaced from the end thereof to put an angular bend therein as indicated at W so that the outer circumference of the coil will remain the same as the coil is rotated around the mandrel as it is carried through the pickling machine.

As shown in Fig. 3 it will be seen that all of the convolutions of the coil are properly spaced from each other within the tank. Thus, as the coil is passed through the pickling tank the acid will have free access to the entire surface of the coil.

Although, as shown in Fig. 3 of the drawings, at some points the angular bends B substantially contact with the next adjacent convolutions of the coil, this does not prevent the pickling solution from contacting the surface of the coil at this point since the rotation of the coil around the mandrel results in a continual movement of the convolutions of the coil relative to each other and these slight points of contact between adjacent convolutions are continuously shifting their positions.

As clearly shown in the drawings, the coil thus formed is not a true helical spiral in that the convolutions are not each formed in a continuous curve, but each convolution is substantially in the form of a convex polygon, the sides of which are preferably of unequal length and slightly rounded and the vertices of which are slightly rounded, this shape being produced by the tight coiling of the strip around the drum provided with irregularly spaced ribs thereon.

With this formation of coil it has been found in actual experience that the coils are perfectly pickled when passed through the ,pickling machine in the manner above referred to and the angular bends formed in the convolutions of the coil do not in any Way interfere with the proper cold rolling of the pickled metal.

' According to the provisions of the patent statutes I have explained the principle of my invention and described one embodiment thereof, but I desire to have it understood that within the scope of the appended claims the invention may be practiced'otherwise than as specically illustrated and described, the invention residing in the formation of projections in the convolutions of the coil to hold the convolutions spaced from each other in the pickling solution, regardless of Whether these projections are of the particular conformation of the angular bends illustrated and described.

I claim:

1. A metal coil prepared for pickling comprising a continuous spiral composed of a plurality of convolutions and spaced, angular bends fprmed in each convolution of the spiral coil, the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions. The bends in succeeding convolutions being progressively spaced further apart from the center to the periphery oi the coil.

2. A metal coil prepared for pickling comprising a continuous spiral composed of a plurality of convolutions and irregularly spaced, angular bends formed in each convolution of the spiral coil, the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions. The bends in succeeding convolutions being progressively spaced further apart from the center to the periphery of the coil.

3. A'metal coil prepared for pickling comprising a continuous spiral composed of a plurality of convolutions spaced from each other and spaced, angular bends formed in each convolution of the spiral coil, the angular bends in each convolution being staggered relative to the angular bends in adjacent convolutions, the convolutions of the coil being separated so as to permit relative movement between adjacent convolu'- tions. The bends in succeeding convolutions being progressively spaced further apart from the center to the periphery of the coil.

4. A metal coil prepared for pickling comprising a continuous spiral 4composed of. a plurality of convolutions and spaced projections formed in each convolution of the spiral coil for spacing c adjacent convolutions of the coil from each other,

the convolutionsof the coil being separated so as to permit relative movement between adjacent convolutions. `The bends in succeeding convolutions being progressively spaced further apart from the center to be periphery ot the coil.

5. A metal coilprepared for pickling comprising a continuous spiral composed oi' a plurality ot convolutions and spaced projections formed in each convolution of the spiral coil for spacing adjacent convolutions of the coil from each other,

the projections in each convolution being staggered relative to the projections in adjacent convolutions. the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions. I'he bends in succeeding convolutions being progressively spaced further apart from the center to the periphery of the coil.

6. A metal coil prepared for pickling comprising ci convolutions and spaced projections formed in each convolution o! the spiral coil for spacing adjacent convolutions of the coil from each other. the coil being oi.' substantially spiral form except at the points where said projections are located, the convolutions of the coil being separated so as to permit relative movement -between adja'- cent convolutions. The bends in succeeding convolutions being progressively spaced further apart from the center to the periphery of the coil.

7. A metal coil prepared for pickling, comprising a continuous spiral strip composed of a plurality of convolutions, eachconvolution in cross section' being substantially in the form of a convex polygon, the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions.

8. A metal coil prepared for pickling, comprising a continuous spiral strip composed of a plurality o! convolutions, each convolution in cross section being substantially in the form of a convex polygon, the sides of which are of unequal length, the convolutions of the coil being separated so as to permit relative movement betweenadjacent convolutions.

9. A metal coil prepared for pickling, comprising a continuous spiral strip composed of'a plurality of convolutions, each convolution `in cross section being substantially in the form of a convex polygon, the vertices of which are slightly rounded, and the convolutions of the coil being separated soas to permit relative movement between adjacent convolutions.

l0. A metal coil prepared for pickling, comprising a continuous spiral strip composed of a plurality ofconvolutions, each convolution i'n cross 'section being substantially in the form of a convex polygon, the sides of which are of unequal length and the vertices of which are slightly rounded, and the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions.

1l. A metal coil prepared for pickling, comprising a continuous spiral strip composed of a plurality of convolutions, each convolution in cross section being substantially in the form of a ccnvex polygon, the sidesof which are slightly curved,

and the convolutions o! the coil being separated so as to permit relative movement between adjacent convolutions.

12. A metal coil prepared for pickling, comprising a continuous spiral strip composed of a plurality of convolutions, each convolution in cross section being substantially in the form of a convex polygon, the sides of which are slightly curved and of unequal length, and the convolutions of the coil being separated so as to permit relative movement between adjacent convolutions.

AGNES J. REEVES GREER. 

